Novel anti-explosion valve plate structure

Abstract

The novel anti-explosion valve plate structure comprises an anti-explosion valve plate, a groove is formed in the top of the anti-explosion valve plate, a warning column is pre-buried in the groove, an opening gap is reserved in the groove, and a warning mark is arranged in the middle of the warning column. By means of the arrangement, in the battery cell production and manufacturing process, the battery cell internal pressure detection device can be used for visually detecting the internal pressure of the battery cell, and when the internal pressure of the battery cell is abnormal, manual recognition, selection and intervention treatment can be carried out in time. In the long-term cycle process of the battery cell, the service life of the battery cell can be recognized and intervened in advance by observing the position change of the warning column, the problem of thermal runaway caused by overlarge internal pressure of the battery cell is avoided, then some potential risks in the use process of the battery cell are avoided, the battery cell has the function of monitoring and recognizing the health condition of the internal pressure of the battery cell, and the service life of the battery cell is prolonged. And when the internal pressure of the battery cell is small, the attractiveness of the anti-explosion valve plate can be ensured, and a user can obtain better use experience.

Description

Technical Field

[0001] The invention relates to the technical field of explosion-proof valve discs, and in particular to a novel explosion-proof valve disc structure. Background Art

[0002] The functions of explosion-proof valve sheets on batteries can be roughly divided into the following three points:

[0003] Prevent explosion: During use, batteries, especially lithium-ion batteries, may experience thermal runaway due to overcharge, overdischarge, short circuit, high temperature, etc., causing a sharp rise in internal pressure. The explosion-proof valve can rupture or open when the pressure reaches a preset value to discharge the high-pressure gas inside the battery to prevent the battery from exploding due to excessive pressure.

[0004] Maintaining air pressure balance: Temperature changes during battery charging and discharging will cause changes in internal air pressure. The explosion-proof valve can maintain the air pressure balance inside and outside the battery to a certain extent, ensuring that the battery works in a stable air pressure environment, which is beneficial to extending battery life and ensuring performance.

[0005] Prevent external impurities from entering: Some explosion-proof valves can not only release pressure, but also block external air and moisture from entering the battery, thus preventing short circuits, corrosion and other problems caused by water vapor in the air entering the battery, affecting the normal use of the battery.

[0006] To summarize the role of existing explosion-proof valves, they are mainly to prevent explosion and release pressure when the battery has an accident. However, it is ignored that once a problem occurs with the battery, not only will the economic loss caused by the battery being scrapped will occur, but the equipment using the battery will also become useless, indirectly causing huge economic losses. For this reason, we provide a new explosion-proof valve structure to avoid this potential risk. Summary of the invention

[0007] The purpose of the present invention is to provide a novel explosion-proof valve plate structure to solve the above-mentioned deficiencies in the prior art.

[0008] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a new explosion-proof valve plate structure, comprising an explosion-proof valve plate, the top of which is provided with a groove, a warning column is embedded in the groove, and the opening gap of the groove is reserved with 0.3-0.6mm, and a warning sign is arranged in the middle of the warning column.

[0009] A buffer groove and a connecting slide groove connecting the buffer groove and the groove are provided in the explosion-proof valve plate. A lifting block whose bottom is fixedly connected to the inner wall of the buffer groove is provided in the connecting slide groove. An arc groove that fits the side of the warning column is provided on the top of the lifting block.

[0010] Furthermore, the warning column is made of a rubber material or an aluminum alloy material that is easy to be pressed and coated.

[0011] Further, the warning post is a cylinder, and the diameter dimension of the warning post is 2 mm.

[0012] Further, the warning sign is a groove opened in the middle of the warning post and sprayed with colored marking paint.

[0013] Further, when the internal air pressure of the battery cell equipped with the explosion-proof valve piece is 0.3 - 0.6 mpa, the opening dimension of the groove is approximately 0.3 - 0.6 mm.

[0014] Further, when the internal air pressure of the battery cell equipped with the explosion-proof valve piece is 0.6 - 1 mpa, the warning post significantly protrudes from the groove, and the opening dimension of the groove is approximately 1 - 1.5 mm.

[0015] Further, when the internal air pressure of the battery cell equipped with the explosion-proof valve piece is 1 - 1.5 mpa, the warning post protrudes from the groove to expose the warning sign, and the opening dimension of the groove is approximately 1.5 - 2 mm.

[0016] In the above technical solution, the beneficial effects of a novel explosion-proof valve piece structure provided by the present invention are as follows:

[0017] 1. With such a setting of the present invention, during the production process of the battery cell, it can be used for visual inspection of the internal pressure of the battery cell. When the internal pressure of the battery cell is abnormal, it can be promptly identified, selected, and intervened by humans.

[0018] 2. During the long-term cycling of the battery cell, by observing the position change of the warning post, the service life of the battery cell can be identified and intervened in advance, avoiding the problem of excessive internal pressure of the battery cell causing thermal runaway, and then avoiding some potential risks during the use of the battery cell, enabling it to have the function of monitoring and identifying the health status of the internal pressure of the battery cell.

[0019] 3. By setting the buffer groove and the jacking block, when the internal pressure of the battery cell is relatively small, only the position of the warning post and the opening dimension of the groove will be changed, and it will not affect the deformation amount at the top of the explosion-proof valve piece, ensuring the aesthetics of the explosion-proof valve piece when the pressure is small and giving users a better use experience.

[0020] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory, and are not used to limit the present disclosure.

[0021] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for use in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other accompanying drawings can also be obtained based on these drawings.

[0023] Figure 1 The structural schematic diagram provided by the embodiment of the present invention;

[0024] Figure 2 The cross-sectional view provided by the embodiment of the present invention;

[0025] Figure 3 Provided by the embodiment of the present invention Figure 2 The enlarged view of part A in

[0026] Explanation of reference numerals:

[0027] 1. Explosion-proof valve plate; 2. Groove; 3. Warning post; 4. Warning sign; 5. Buffer groove; 6. Lifting block; 7. Connecting chute. Specific implementation manner

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present disclosure with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0029] Embodiment 1

[0030] Please refer to Figure 1 - Figure 2 , a novel explosion-proof valve plate structure, including an explosion-proof valve plate 1, a groove 2 is opened at the top of the explosion-proof valve plate 1, a warning post 3 is embedded in the groove 2, and a 0.3 mm opening gap is reserved for the groove 2. A warning sign 4 is arranged in the middle of the warning post 3. A buffer groove 5 and a connecting chute 7 connecting the buffer groove 5 and the groove 2 are opened in the explosion-proof valve plate 1. A lifting block 6 with its bottom fixedly connected to the inner wall of the buffer groove 5 is arranged in the connecting chute 7. An arc groove that fits the side of the warning post 3 is opened at the top of the lifting block 6.

[0031] Specifically, the present invention is configured in such a way that during the production process of the battery cell, it can be used for visual inspection of the internal pressure of the battery cell. When the internal pressure of the battery cell is abnormal, it can be promptly identified and intervened by humans. During the long-term cycling of the battery cell, by observing the position change of the warning column 3, the service life of the battery cell can be identified and intervened in advance, avoiding the problem of excessive internal pressure of the battery cell causing thermal runaway, and thus avoiding some potential risks during the use of the battery cell. By setting the buffer groove 5 and the jacking block 6, when the internal pressure of the battery cell is relatively small, only the position of the warning column 3 and the opening size of the groove 2 will be changed, without affecting the deformation amount of the top of the explosion-proof valve piece 1, ensuring the aesthetics of the explosion-proof valve piece 1 when the pressure is small and providing a better user experience.

[0032] Further, the warning column 3 is made of a rubber-like material or an aluminum alloy material that is easy to press-fit and wrap.

[0033] Specifically, during production, it is convenient to use a stamping device to press-fit the warning column 3 into the explosion-proof valve piece 1.

[0034] Further, the warning column 3 is a cylinder, and the diameter size of the warning column 3 is 2 mm.

[0035] Further, the warning sign 4 is a groove opened in the middle of the warning column 3 and sprayed with a colored marking paint. The colored paint can be a red hot-melt marking paint, which has good high-temperature resistance and wear resistance, ensuring that the warning sign 4 always has a warning effect during the use of the explosion-proof valve piece 1.

[0036] Further, when the internal air pressure inside the battery cell equipped with the explosion-proof valve piece 1 is 0.3 mpa, the opening size of the groove 2 is approximately 0.3 mm. When the internal air pressure inside the battery cell equipped with the explosion-proof valve piece 1 is 0.6 mpa, the warning column 3 significantly protrudes from the groove 2, and the opening size of the groove 2 is approximately 1 mm. When the internal air pressure inside the battery cell equipped with the explosion-proof valve piece 1 is 1 mpa, the warning column 3 protrudes from the groove 2 and exposes the warning sign 4, and the opening size of the groove 2 is approximately 1.5 mm.

[0037] In the present invention, when the internal air pressure of the battery cell is 0.1 mpa, only the head of the warning column 3 in the explosion-proof valve piece 1 is exposed, and the opening size is approximately 0.3 mm;

[0038] When the internal air pressure of the battery cell is 0.3 mpa, the position where the head of the warning column 3 in the explosion-proof valve piece 1 is exposed, and the opening size is approximately 0.6 mm. At this time, no red warning line is seen;

[0039] When the internal air pressure of the battery cell is 0.6 mpa, the warning column 3 in the explosion-proof valve piece 1 begins to expose the column body upwards, and the opening size is approximately 1 - mm. The column body is significantly exposed, and at this time, it is close to the red warning line area;

[0040] When the air pressure inside the battery cell is 1 MPa, the warning column 3 in the explosion-proof valve sheet 1 further emerges upward, the opening size is about 1.5 mm, the column body has obviously protruded from the inside of the groove 2, and a red warning line can be seen;

[0041] In the present invention, reference Figure 1 and Figure 2 Through the variation range of the internal pressure of the battery cell, the explosion-proof valve sheet 1 is locally compressed. When the pressure reaches a certain range, the groove 2 of the embedded warning column 3 will be lifted and deformed, thereby squeezing the warning column 3 at the groove 2 and discharging it out of the groove 2. In this process, the range of the internal pressure of the battery cell can be identified by observing the warning mark 4 set on the warning column 3, so as to take different measures for the battery cell.

[0042] Embodiment 2

[0043] See also Figure 1 - Figure 2 A new explosion-proof valve plate structure includes an explosion-proof valve plate 1, a groove 2 is provided on the top, a warning column 3 is embedded in the groove 2, and an opening gap of the groove 2 is reserved for 0.6mm, a warning sign 4 is provided in the middle of the warning column 3, a buffer groove 5 and a connecting slide groove 7 connecting the buffer groove 5 and the groove 2 are provided in the explosion-proof valve plate 1, a lifting block 6 whose bottom is fixedly connected to the inner wall of the buffer groove 5 is provided in the connecting slide groove 7, and an arc groove is provided on the top of the lifting block 6 to fit the side of the warning column 3.

[0044] Specifically, the present invention is configured in such a way that it can be used for visual detection of the internal pressure of the battery cell during the production and manufacturing process of the battery cell. When the internal pressure of the battery cell is abnormal, it can be manually identified, selected and intervened in time. During the long-term circulation of the battery cell, by observing the position change of the warning column 3, the service life of the battery cell can be identified and intervened in advance, so as to avoid the problem of excessive internal pressure of the battery cell and thermal runaway, and then avoid some potential risks in the use of the battery cell. By providing the buffer groove 5 and the lifting block 6, it can be achieved that when the internal pressure of the battery cell is small, only the position of the warning column 3 and the opening size of the groove 2 will be changed, and the deformation of the top of the explosion-proof valve plate 1 will not be affected, so that the aesthetics of the explosion-proof valve plate 1 when the pressure is small can be guaranteed, so that users can get a better use experience.

[0045] Furthermore, the warning column 3 is made of a rubber material or an aluminum alloy material that is easy to be pressed and covered.

[0046] Specifically, for the convenience of production, the warning column 3 is pressed into the interior of the explosion-proof valve plate 1 by using a stamping device.

[0047] Furthermore, the warning column 3 is a cylinder, and the diameter of the warning column 3 is 2 mm.

[0048] Furthermore, the warning sign 4 is a groove for spraying colored marking paint in the middle of the warning column 3. The colored paint can be red hot-melt marking paint, which has good high temperature resistance and wear resistance, ensuring that the warning sign 4 always has a warning function during the use of the explosion-proof valve plate 1.

[0049] Further, when the internal air pressure of the battery cell equipped with the explosion-proof valve sheet 1 is 0.6 MPa, the opening size of the groove 2 is approximately 0.6 mm; when the internal air pressure of the battery cell equipped with the explosion-proof valve sheet 1 is 1 MPa, the warning column 3 obviously protrudes out of the groove 2, and the opening size of the groove 2 is approximately 1.5 mm; when the internal air pressure of the battery cell equipped with the explosion-proof valve sheet 1 is 1.5 MPa, the warning column 3 protrudes out of the groove 2 to reveal the warning sign 4, and the opening size of the groove 2 is approximately 2 mm.

[0050] In the present invention, when the internal air pressure of the battery cell is 0.3 MPa, the warning column 3 in the explosion-proof valve plate 1 only exposes the head, and the opening size is about 0.6 mm;

[0051] When the internal pressure of the battery cell is 0.6 MPa, the warning column 3 in the explosion-proof valve sheet 1 is exposed, and the opening size is about 1 mm. At this time, no red warning line is visible;

[0052] When the internal pressure of the battery cell is 1 MPa, the warning column 3 in the explosion-proof valve sheet 1 begins to expose the column upward, with an opening size of about 1.5 mm. The column is obviously exposed, and it is close to the red warning line area;

[0053] When the internal pressure of the battery cell is 1.5 MPa, the warning column 3 in the explosion-proof valve plate 1 further emerges upward, the opening size is about 2 mm, the column body has obviously protruded from the inside of the groove 2, and the red warning line is visible;

[0054] In the present invention, reference Figure 1 and Figure 2 Through the variation range of the internal pressure of the battery cell, the explosion-proof valve sheet 1 is locally compressed. When the pressure reaches a certain range, the groove 2 of the embedded warning column 3 will be lifted and deformed, thereby squeezing the warning column 3 at the groove 2 and discharging it out of the groove 2. In this process, the range of the internal pressure of the battery cell can be identified by observing the warning mark 4 set on the warning column 3, so as to take different measures for the battery cell.

[0055] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; in addition, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Only some exemplary embodiments of the present invention have been described above by way of illustration. Without doubt, for those of ordinary skill in the art, various different ways can be used to modify the described embodiments without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A novel explosion-proof valve plate structure, comprising an explosion-proof valve plate (1), characterized in that: The top is provided with a groove (2), a warning column (3) is embedded in the groove (2), and an opening gap of the groove (2) is reserved with a size of 0.3-0.6 mm, and a warning sign (4) is arranged in the middle of the warning column (3). The explosion-proof valve plate (1) is provided with a buffer groove (5) and a connecting slide groove (7) connecting the buffer groove (5) and the groove (2); the connecting slide groove (7) is provided with a lifting block (6) whose bottom is fixedly connected to the inner wall of the buffer groove (5); the top of the lifting block (6) is provided with an arc groove that fits the side of the warning column (3).

2. A novel explosion-proof valve plate structure according to claim 1, characterized in that: The warning column (3) is made of a rubber material or an aluminum alloy material that is easy to press-fit and coat.

3. A novel explosion-proof valve plate structure according to claim 2, characterized in that: The warning column (3) is a cylinder, and the diameter of the warning column (3) is 2 mm.

4. A novel explosion-proof valve plate structure according to claim 3, characterized in that: The warning sign (4) is a groove sprayed with color marking paint in the middle of the warning column (3).

5. A novel explosion-proof valve plate structure according to claim 1, characterized in that: When the internal air pressure of the battery cell equipped with the explosion-proof valve sheet (1) is 0.3-0.6 MPa, the opening size of the groove (2) is approximately 0.3-0.6 mm.

6. A novel explosion-proof valve plate structure according to claim 1, characterized in that: When the internal air pressure of the battery cell equipped with the explosion-proof valve sheet (1) is 0.6-1 MPa, the warning column (3) obviously protrudes out of the groove (2), and the opening size of the groove (2) is about 1-1.5 mm.

7. A novel explosion-proof valve plate structure according to claim 1, characterized in that: When the internal air pressure of the battery cell equipped with the explosion-proof valve plate (1) is 1-1.5 MPa, the warning column (3) protrudes out of the groove (2) to expose the warning mark (4), and the opening size of the groove (2) is about 1.5-2 mm.

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